JP2004304904A - Stator and rotary electric machine - Google Patents

Stator and rotary electric machine Download PDF

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Publication number
JP2004304904A
JP2004304904A JP2003093803A JP2003093803A JP2004304904A JP 2004304904 A JP2004304904 A JP 2004304904A JP 2003093803 A JP2003093803 A JP 2003093803A JP 2003093803 A JP2003093803 A JP 2003093803A JP 2004304904 A JP2004304904 A JP 2004304904A
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Japan
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stator
teeth
core back
cylindrical body
mounting portion
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JP2003093803A
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JP4032352B2 (en
Inventor
Shinji Makita
真治 牧田
Akito Akimoto
明人 秋本
Takahiro Soki
高広 左右木
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Denso Corp
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Denso Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an attachment structure for a stator for a rotary electric machine formed by attaching teeth 1 at a core back 2, capable of minimizing a gap between an attachment portion 11 of the teeth 1 and first and second attached portions 23, 24 of the core back 2 without breaking the attachment portion 11 or the first and the second attached portions 23, 24. <P>SOLUTION: The core back 2 is divided in a rotational shaft direction of the rotary electric machine into two parts of a first sleeve shaped body 21 and a second sleeve shaped body 22. The attachment portion 11 in a protruding condition provided at a reverse-rotational shaft side edge surface 14 of the teeth 1 is sandwiched by the first attached portion 23 in a recessed condition provided at the first sleeved body 21, and the second attached portion 24 in a recessed condition provided at the second sleeved body 22 to apply force in the rotational shaft direction to the first and second sleeved bodies 21, 22, thus minimizing the gap between the attachment portion 11 of the teeth 1 and the first and second attached portions 23, 24 of the first and the second sleeved bodies 21, 22. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、固定子および回転電機に関する。
【０００２】
【従来の技術】
従来から、回転電機の固定子製造工程の作業性向上、および回転特性の向上を目的として、固定子巻線が装着されるティースと、このティースを保持するコアバックとを別体で成型しておき、ティースに固定子巻線を巻いた後、コアバックへ取り付ける方法が公知である（例えば特許文献１参照）。
【０００３】
【特許文献１】
特開平９−２１５２３０号公報（第３―５頁、図１）
【０００４】
【発明が解決しようとする課題】
しかし、この方法では、ティースの取付部とコアバックの被取付部との間にギャップが生じるため磁気抵抗が増大し、回転特性が低下してしまうという問題があった。逆にティースの取付部とコアバックの被取付部との間のギャップを小さくするため、ティースの取付部とコアバックの被取付部との嵌合をきつくすると、ティースをコアバックへ取り付ける際に、ティースの取付部またはコアバックの被取付部が破損するという問題が生じる。
【０００５】
【本発明の目的】
本発明の目的は、ティースの取付部とコアバックの被取付部との間のギャップを小さくでき、かつティースをコアバックへ取り付ける際のティースの取付部またはコアバックの被取付部の破損を防止することができる取付構造を有する固定子およびこれを用いた回転電機を提供することにある。
【０００６】
【課題を解決するための手段】
〔請求項１の手段〕
請求項１に記載の発明によれば、ティースとコアバックとが別体で成型された後、ティースをコアバックに取り付けてなる固定子において、コアバックは、回転電機の回転軸方向に２分割された第１筒状体および第２筒状体からなる。そして、固定子は、ティースの反回転軸側端面に設けられた凸状の取付部を、第１筒状体に設けられた凹状の第１被取付部、および第２筒状体に設けられた凹状の第２被取付部で、挟むことにより形成される。
これにより、第１、２筒状体に回転軸方向の力を加えることにより、ティースの取付部と第１、２筒状体の第１、２被取付部との間のギャップを縮めることができるので、ティースとコアバックとを別体で成型することに伴う回転特性の低下を、防止することができる。さらに、第１筒状体と第２筒状体とを回転電機の回転軸方向に２等分割しておけば、ティースをコアバックの回転軸方向の中央に配置させることができる。
【０００７】
〔請求項２の手段〕
請求項２に記載の発明によれば、ティースの取付部は、反回転軸側端面から凸状に突起する方向に向かい、回転軸方向の長さが徐々に大きくなっている。また、コアバックの第１被取付部および第２被取付部は、各々、第１筒状体および第２筒状体の回転軸方向における端部から切欠きを設けることによって形成され、この切欠きの深さは、第１筒状体および第２筒状体の内周側から外周側に向かい、徐々に大きくなっている。
これにより、第１、２筒状体に回転軸方向の力を加えることにより、ティースの取付部は、第１、２筒状体により形成されるコアバックの内周側から外周側に向かって押出されるので、ティースの取付部とコアバックの第１、２被取付部との間のギャップをなくすことができる。また、コアバックに回転軸方向の力を加えても、ティースがコアバックの内周側から回転軸の方に向かって抜け出るのを防止することができる。
また、ティースを第１、２筒状体に取り付ける際に、ティースに巻かれた固定子巻線と第１、２筒状体とがほとんど接触しないので、固定子巻線の絶縁皮膜の損傷が少ない。
【０００８】
〔請求項３の手段〕
請求項３に記載の発明によれば、固定子を形成した後も、第１筒状体において第１被取付部を有する端部と、第２筒状体において前記第２被取付部を有する端部とが接触しない。
これにより、第１、２筒状体に対して回転軸方向に力を加えた際に、第１筒状体において第１被取付部を有する端部と、第２筒状体において第２被取付部を有する端部とが接触することによる干渉を防ぐことができる。すなわち、端部同士の接触による干渉が生じると、第１、２筒状体に対して回転軸方向にさらに力を加えても、取付部と第１、２被取付部との間のギャップを縮めることができなくなる。しかし、固定子形成後も、端部同士が接触しないように予め設計しておけば、このような問題を防ぐことができる。
【０００９】
〔請求項４の手段〕
請求項４に記載の発明によれば、固定子巻線巻軸方向に垂直な投影面への取付部の投影面積は、同じ投影面への反回転軸側端面の投影面積よりも小さい。
これにより、ティースへ固定子巻線を装着することが可能になるため、ティースとコアバックとが別体の状態で、加工した固定子巻線をティースに装着することができる。このため、固定子巻線の加工の自由度が増し、占積率を向上させることができる。
【００１０】
〔請求項５の手段〕
請求項５に記載の発明によれば、反回転軸側端面と、反回転軸側端面が接触するコアバック側の接触面とは互いに平面をなしている。
これにより、コアバックとティースとの接触部の内、第１被取付部と取付部との接触部、および第２被取付部と取付部との接触部を除いた部分で充分な接触面積を確保することができるので、ティースとコアバックとの取付剛性を強化できる。すなわち、ティース側の反回転軸側端面と、この反回転軸側端面が接触するコアバック側の接触面とが互いに曲面をなしていると、ティースおよびコアバックの加工精度によっては、各々の曲率に差が生じる可能性がある。これにより接触面積が小さくなるおそれがある。しかし、両方を平面にして、互いに接するようにしておけばこのような問題は生じない。
【００１１】
〔請求項６の手段〕
請求項６に記載の発明によれば、ティース、第１筒状体および第２筒状体は、各々、磁気粉末材料を用いて個別に成型される。
これにより、凸状の取付部や凹状の被取付部のような複雑な形状も、金型を用いて圧縮成型することができるので、従来の積層板を用いる方法に比べ、製作が容易になる。
【００１２】
〔請求項７の手段〕
請求項７に記載の発明によれば、予め成型されたティースに固定子巻線を装着し、続いて、コアバックを成型するのに必要な量の磁気粉末材料と、固定子巻線が装着されたティースとを一体的に成型することにより、固定子が形成される。これにより、ティースに装着された固定子巻線を、コアバックと一体になる前に加工することができるので、占積率を向上させることができる。さらに、このティースを用いて固定子を形成する際、コアバック部分を磁気粉末材料で成型するので、ティースとコアバックとの接合部におけるギャップを確実にゼロにすることができる。
【００１３】
〔請求項８の手段〕
請求項８に記載の発明によれば、回転電機の固定子は、請求項１ないし請求項７のうちのいずれか１つに記載の固定子が用いられる。
これにより、請求項１ないし請求項７の効果のうちのいずれか１つの効果を有する固定子を用いた回転電機を提供することができる。
【００１４】
【発明の実施の形態】
〔実施形態の構成〕
本発明の実施形態を図１ないし図５に基づいて説明する。なお、本実施形態に係る固定子は、回転電機に用いられる固定子である。そして、直流電動機に適用されると、固定子巻線に流れる電流によって磁界を作る界磁石となる。また、交流発電機に適用されると、固定子巻線に誘起電圧を発生させる電機子となる。
【００１５】
本実施形態に係る固定子は、図１に示すごとく、固定子巻線（図示せず）が装着される複数のティース１と、ティース１を保持する筒状のコアバック２とを含んで構成される。さらにコアバック２は、直流電動機や交流発電機などの回転電機の回転軸方向に２等分割された第１筒状体２１および第２筒状体２２から構成される。そして、固定子は、ティース１に設けられた凸状の取付部１１が、第１筒状体２１に設けられた凹状の第１被取付部２３、および第２筒状体２２に設けられた凹状の第２被取付部２４で、挟まれることにより形成される。なお、ティース１、ならびにコアバック２の第１筒状体２１および第２筒状体２２は、ニッケル−鉄合金、軟鉄、けい素鋼、ニッケル、コバルトなどの磁気粉末材料を用いて個別に圧縮成型される。
【００１６】
ティース１は、図２（ａ）に示すごとく、取付部１１、鉄心部１２および片部１３から構成されている。取付部１１は、ティース１の反回転軸側端面１４（鉄心部１２の反回転軸側端面１４にもなっている）から凸状に突起するようにして設けられている。そして、回転軸方向の長さが、凸状に突起する方向に向かい（反回転軸の方向に向かい）、徐々に大きくなっている。鉄心部１２は、固定子巻線が装着される固定子鉄心をなす部分である。鉄心部１２の反回転軸側端面１４は平面をなしている。そして、図３に示すごとく、反回転軸側端面１４の固定子巻線巻軸方向に垂直な投影面への投影面積は、同じ投影面への取付部１１の投影面積よりも大きくなっている。片部１３は、ティース１の回転軸側端部（鉄心部１２の回転軸側端部にもなっている）に設けられ、固定子と回転子との間のギャップを形成する。ここで、固定子巻線巻軸とは、コイル素線を巻いて固定子巻線を形成する際の中心軸をなすものである。そして、固定子巻線巻軸方向とは、ティース１の突起方向、すなわち取付部１１の中心と片部１３の中心とを結ぶ方向に略一致する方向である。
【００１７】
コアバック２の第１筒状体２１および第２筒状体２２は、各々、凹状の第１被取付部２３および第２被取付部２４を、取り付けられるティース１の数だけ有している。第１、２被取付部２３、２４は、図２（ｂ）に示すごとく第１、２筒状体２１、２２の回転軸方向における端部から切欠きを設けることによって形成されている。この切欠きの深さは、第１、２筒状体２１、２２の内周側から外周側に向かい、徐々に大きくなっている。また、取付部１１、および第１、２被取付部２３、２４は、固定子を形成した後も、第１筒状体２１において第１被取付部２３を有する端部と、第２筒状体２２において第２被取付部２４を有する端部とが接触しないように設計されている。さらに、第１、２筒状体２１、２２の内周部は、第１、２被取付部２３、２４の切欠きごとに平面が加工され、多角柱の側面のような内周面をなしている。そして、各切欠きに対応した内周側の平面は、ティース１の反回転軸側端面１４が接触する接触面２５、２６をなしている。
【００１８】
〔実施形態の作用〕
次に、本実施形態の作用を説明する。まず、ティース１、第１筒状体２１および第２筒状体２２が、個別に磁気粉末材料を用いて圧縮成型される。そして、ティース１の取付部１１の方から、鉄心部１２に固定子巻線を装着する。次に、図５（ａ）に示すごとく、ティース１に設けられた取付部１１を、第１筒状体２１に設けられた第１被取付部２３、および第２筒状体２２に設けられた第２被取付部２４で挟みこむ。そして、第１、２被取付部２３、２４を有しない第１、２筒状体２１、２２の端部から、回転軸方向の力を加える。これにより、図５（ｂ）に示すごとく、ティース１の取付部１１は、第１、２筒状体２１、２２により形成されるコアバック２の内周側から外周側に向かって押出される。
【００１９】
取付部１１および第１、２被取付部２３、２４の寸法は、第１筒状体２１において第１被取付部２３を有する端部と、第２筒状体２２において第２被取付部２４を有する端部とが接触して干渉しないように設計されている。このため、取付部１１の押出しは、取付部１１と第１、２被取付部２３、２４とのギャップがなくなり、ティース１の反回転軸側端面１４と第１、２筒状体２１、２２の接触面２５、２６とが接触するまで続けられる。
【００２０】
〔実施形態の効果〕
以上のように、コアバック２を回転軸方向に２分割して第１、２筒状体２１、２２とし、ティース１の反回転軸側端面１４に設けた凸状の取付部１１を、第１、２筒状体２１、２２に設けた凹状の第１、２被取付部２３、２４で挟み、第１、２筒状体２１、２２に回転軸方向の力を加えることにより、固定子を形成する。
これにより、従来、コアバック２にティース１を嵌合する際に生じていた嵌合部分におけるギャップを縮めて、回転電機の回転特性の低下を防止することができる。さらに、第１、２筒状体２１、２２を回転電機の回転軸方向に２等分割しておけば、ティース１をコアバック２の回転軸方向の中央に配置させることができる。
【００２１】
また、取付部１１は、反回転軸側端面１４から凸状に突起する方向に向かい、徐々に回転軸方向の長さが大きくなっており、第１、２被取付部２３、２４は、各々、第１、２筒状体２１、２２の端部から切欠きを設けることによって形成され、この切欠きの深さは、第１、２筒状体２１、２２の内周から外周に向かい徐々に大きくなっている。
これにより、ティース１の取付部１１は、第１、２筒状体２１、２２により形成されるコアバック２の内周側から外周側に向かって押出されるので、ティース１とコアバック２との嵌合部において生じていたギャップをなくすことができる。また、コアバック２に回転軸方向の力を加えても、ティース１がコアバック２の内周側から回転軸の方に向かって抜け出るのを防止することができる。
また、ティース１を第１、２筒状体２１、２２に取り付ける際に、ティース１に巻かれた固定子巻線と第１、２筒状体２１、２２とがほとんど接触しないので、固定子巻線の絶縁皮膜の損傷が少ない。
【００２２】
また、取付部１１および第１、２被取付部２３、２４の寸法は、固定子形成後も、第１筒状体２１において第１被取付部２３を有する端部と、第２筒状体２２において第２被取付部２４を有する端部とが接触して干渉しないように設計されている。
これにより、取付部１１と第１、２被取付部２３、２４とのギャップがなくなるまで、コアバック２に回転軸方向の力を加えることができる。
【００２３】
また、固定子巻線巻軸方向に垂直な投影面への取付部１１の投影面積は、同じ投影面への反回転軸側端面１４の投影面積よりも小さい。
これにより、ティース１の取付部１１の方から、鉄心部１２に固定子巻線を装着することが可能になる。このため、ティース１とコアバック２とが別体の状態で、加工した固定子巻線をティース１に装着することができるため、固定子巻線の加工の自由度が増し、占積率を向上させることができる。
【００２４】
また、ティース１の反回転軸側端面１４は平面をなし、第１、２筒状体２１、２２の内周部は、第１、２被取付部２３、２４の切欠きごとに平面が加工され、多角柱の側面のような内周面（接触面２５、２６）をなしている。
これにより、ティース１とコアバック２との接触部の内、取付部１１と第１、２被取付部２３、２４との接触部を除いた部分で充分な接触面積を確保することができるので、ティース１とコアバック２との取付剛性を強化できる。すなわち図４に示すごとく、ティース１側の反回転軸側端面１４と、コアバック２側の接触面２５、２６とが互いに曲面をなしていると、ティース１およびコアバック２の加工精度によっては、各々の曲率に差が生じる可能性がある。このため接触面積が小さくなるおそれがある。しかし、両方を平面にしておけばこのような問題は生じない。
【００２５】
さらに、ティース１、および第１、２筒状体２１、２２は、各々、磁気粉末材料を用いて個別に成型される。
これにより、凸状の取付部１１や凹状の第１、２被取付部２３、２４のような複雑な形状も、金型を用いて圧縮成型することができるので、従来の積層板を用いる方法に比べ、製作が容易になる。
【００２６】
〔他の実施形態〕
本実施形態のティース１、ならびにコアバック２の第１筒状体２１および第２筒状体２２は磁気粉末材料を用いて個別に圧縮成型されているが、従来の積層板を用いる方法で成型してもよい。あるいは、予め成型されたティース１に固定子巻線を装着し、続いて、コアバック２を成型するのに必要な量の磁気粉末材料と、固定子巻線が装着されたティース１とを一体的に成型することにより、固定子を形成してもよい。
また、本実施形態のティース１は片部を有しているが、なくても構わない。
【図面の簡単な説明】
【図１】実施形態の固定子の構成を示す斜視図である。
【図２】（ａ）は実施形態のティースを示す斜視図である。（ｂ）は実施形態の筒状体を示す部分斜視図である。
【図３】実施形態のティースの背面図である。
【図４】ティースとコアバックとの曲率差による取付剛性の低下を説明する説明図である。
【図５】（ａ）はティースの取付部を、第１、２筒状体の第１、２被取付部で挟んだ状態を示す状態図である。（ｂ）はティースの取付部を、第１、２筒状体の第１、２被取付部で挟んだ後、回転軸方向に力を加えた状態を示す状態図である。
【符号の説明】
１ ティース
１１ 取付部
１２ 鉄心部
１３ 片部
１４ 反回転軸側端面
２ コアバック
２１ 第１筒状体
２２ 第２筒状体
２３ 第１被取付部
２４ 第２被取付部
２５ 接触面（第１筒状体側）
２６ 接触面（第２筒状体側）[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a stator and a rotating electric machine.
[0002]
[Prior art]
Conventionally, for the purpose of improving the workability of the stator manufacturing process of the rotating electric machine and improving the rotation characteristics, the teeth on which the stator windings are mounted and the core back that holds these teeth are molded separately. A method is known in which a stator winding is wound around a tooth and then attached to a core back (for example, see Patent Document 1).
[0003]
[Patent Document 1]
JP-A-9-215230 (pages 3-5, FIG. 1)
[0004]
[Problems to be solved by the invention]
However, in this method, there is a problem in that a gap is formed between the teeth attachment portion and the core back attachment portion, so that the magnetic resistance increases and the rotation characteristics deteriorate. Conversely, if the fitting between the teeth mounting section and the core back mounting section is tight enough to reduce the gap between the teeth mounting section and the core back mounting section, when the teeth are mounted on the core back, In addition, there is a problem that the attachment portion of the teeth or the attachment portion of the core back is damaged.
[0005]
[Object of the present invention]
An object of the present invention is to reduce a gap between a tooth attachment portion and a core back attachment portion, and prevent damage to a tooth attachment portion or a core back attachment portion when attaching a tooth to a core back. It is an object of the present invention to provide a stator having a mounting structure capable of mounting and a rotating electric machine using the same.
[0006]
[Means for Solving the Problems]
[Means of claim 1]
According to the first aspect of the present invention, in the stator in which the teeth and the core back are formed separately from each other and then the teeth are attached to the core back, the core back is divided into two parts in the rotation axis direction of the rotating electric machine. And a first cylindrical body and a second cylindrical body. The stator has a convex mounting portion provided on the end face of the tooth on the side opposite to the rotation shaft, and a concave first mounting portion provided on the first cylindrical body and a second cylindrical body. It is formed by being sandwiched by the concave second attached portion.
Thus, by applying a force in the rotation axis direction to the first and second cylindrical bodies, the gap between the teeth mounting portion and the first and second mounting portions of the first and second cylindrical bodies can be reduced. Therefore, it is possible to prevent the rotation characteristics from being lowered due to the separate molding of the teeth and the core back. Furthermore, if the first cylindrical body and the second cylindrical body are divided into two equal parts in the rotation axis direction of the rotating electric machine, the teeth can be arranged at the center of the core back in the rotation axis direction.
[0007]
[Means of Claim 2]
According to the second aspect of the present invention, the length of the tooth mounting portion gradually increases in the direction of the rotation axis in the direction in which the teeth protrude from the end surface on the side opposite to the rotation axis. Further, the first attached portion and the second attached portion of the core back are formed by providing cutouts from ends of the first tubular body and the second tubular body in the rotation axis direction, respectively. The depth of the notch gradually increases from the inner peripheral side to the outer peripheral side of the first tubular body and the second tubular body.
Thus, by applying a force in the rotation axis direction to the first and second cylindrical bodies, the teeth attaching portion moves from the inner peripheral side to the outer peripheral side of the core back formed by the first and second cylindrical bodies. Since it is extruded, it is possible to eliminate a gap between the teeth attachment portion and the first and second attachment portions of the core back. Further, even when a force in the direction of the rotation axis is applied to the core back, the teeth can be prevented from coming off from the inner peripheral side of the core back toward the rotation axis.
Further, when the teeth are attached to the first and second cylindrical bodies, the stator winding wound around the teeth and the first and second cylindrical bodies hardly come into contact with each other. Few.
[0008]
[Means of Claim 3]
According to the third aspect of the invention, even after the stator is formed, the first cylindrical body has the end having the first mounted portion, and the second cylindrical body has the second mounted portion. Edge does not contact.
Thus, when a force is applied to the first and second cylindrical bodies in the rotation axis direction, the end having the first mounting portion in the first cylindrical body and the second covering in the second cylindrical body. It is possible to prevent interference caused by contact with the end having the mounting portion. That is, when interference occurs due to contact between the end portions, the gap between the mounting portion and the first and second mounted portions is increased even if further force is applied to the first and second cylindrical bodies in the rotation axis direction. It cannot be shrunk. However, such a problem can be prevented by designing in advance so that the ends do not contact each other even after the stator is formed.
[0009]
[Means of Claim 4]
According to the invention described in claim 4, the projected area of the mounting portion on the projection plane perpendicular to the winding direction of the stator winding is smaller than the projected area of the end surface on the opposite rotation axis side to the same projection plane.
Accordingly, the stator winding can be mounted on the tooth, and thus the processed stator winding can be mounted on the tooth in a state where the tooth and the core back are separated from each other. Therefore, the degree of freedom in processing the stator winding is increased, and the space factor can be improved.
[0010]
[Means of claim 5]
According to the fifth aspect of the present invention, the end face on the non-rotating shaft side and the contact surface on the core back side with which the end face on the non-rotating shaft side makes a plane with each other.
As a result, a sufficient contact area is obtained in the contact portions between the core back and the teeth, except for the contact portions between the first attached portion and the attachment portion and the contact portions between the second attached portion and the attachment portion. As a result, the rigidity of the attachment between the teeth and the core back can be enhanced. That is, if the end surface on the anti-rotational shaft side on the tooth side and the contact surface on the core back side with which the end surface on the anti-rotational shaft side makes a curved surface mutually, depending on the processing accuracy of the teeth and the core back, the respective curvatures May be different. This may reduce the contact area. However, such a problem does not occur if both are made flat and are in contact with each other.
[0011]
[Means of claim 6]
According to the invention described in claim 6, the teeth, the first cylindrical body, and the second cylindrical body are individually molded using a magnetic powder material.
Thus, even a complicated shape such as a convex mounting portion or a concave mounting portion can be compression-molded by using a mold, so that the production becomes easier as compared with a conventional method using a laminated plate. .
[0012]
[Means of claim 7]
According to the seventh aspect of the present invention, the stator winding is mounted on the preformed teeth, and then the amount of magnetic powder material necessary for forming the core back and the stator winding are mounted. The stator is formed by integrally molding the set teeth. Thus, the stator winding mounted on the teeth can be processed before being integrated with the core back, so that the space factor can be improved. Further, when the stator is formed using the teeth, the core back portion is formed of a magnetic powder material, so that the gap at the joint between the teeth and the core back can be reliably reduced to zero.
[0013]
[Means of claim 8]
According to the invention described in claim 8, the stator according to any one of claims 1 to 7 is used as the stator of the rotating electric machine.
Thus, it is possible to provide a rotating electric machine using the stator having any one of the effects of claims 1 to 7.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
[Configuration of Embodiment]
An embodiment of the present invention will be described with reference to FIGS. Note that the stator according to the present embodiment is a stator used for a rotating electric machine. Then, when applied to a DC motor, it becomes a field magnet that creates a magnetic field by the current flowing through the stator winding. When applied to an AC generator, the armature generates an induced voltage in the stator winding.
[0015]
As shown in FIG. 1, the stator according to the present embodiment includes a plurality of teeth 1 to which stator windings (not shown) are attached, and a cylindrical core back 2 that holds the teeth 1. Is done. Further, the core back 2 is composed of a first tubular body 21 and a second tubular body 22 that are equally divided in the rotation axis direction of a rotating electric machine such as a DC motor or an AC generator. In the stator, the convex mounting portion 11 provided on the teeth 1 is provided on the concave first mounted portion 23 provided on the first cylindrical body 21 and the second cylindrical body 22. It is formed by being sandwiched by the concave second attached portion 24. The teeth 1 and the first cylindrical body 21 and the second cylindrical body 22 of the core back 2 are individually compressed using a magnetic powder material such as a nickel-iron alloy, soft iron, silicon steel, nickel, and cobalt. It is molded.
[0016]
As shown in FIG. 2A, the tooth 1 includes a mounting portion 11, an iron core 12, and a piece 13. The attachment portion 11 is provided so as to protrude from the end surface 14 of the tooth 1 opposite to the rotation shaft (which is also the end surface 14 of the iron core portion 12 opposite to the rotation shaft). Then, the length in the direction of the rotation axis gradually increases toward the direction in which the projection protrudes (toward the direction of the anti-rotation axis). The iron core part 12 is a part that forms a stator iron core on which the stator winding is mounted. The end surface 14 of the iron core 12 opposite to the rotation shaft is flat. Then, as shown in FIG. 3, the projected area of the anti-rotational shaft side end face 14 on a projection plane perpendicular to the stator winding axis direction is larger than the projected area of the mounting portion 11 on the same projection plane. . The piece 13 is provided at the end of the teeth 1 on the rotation shaft side (also serving as the end of the iron core 12 on the rotation shaft side), and forms a gap between the stator and the rotor. Here, the stator winding winding axis forms a central axis when winding a coil wire to form a stator winding. The direction of the winding axis of the stator winding is substantially the same as the direction in which the teeth 1 project, that is, the direction that connects the center of the mounting portion 11 and the center of the piece 13.
[0017]
Each of the first tubular body 21 and the second tubular body 22 of the core back 2 has a concave first attached portion 23 and a second attached portion 24, the number of which is equal to the number of the teeth 1 to be attached. The first and second mounting portions 23 and 24 are formed by providing cutouts from ends of the first and second cylindrical bodies 21 and 22 in the rotation axis direction as shown in FIG. 2B. The depth of the notch gradually increases from the inner peripheral side of the first and second cylindrical bodies 21 and 22 to the outer peripheral side. Further, after the stator is formed, the mounting portion 11 and the first and second mounted portions 23 and 24 have an end having the first mounted portion 23 in the first cylindrical body 21 and a second cylindrical shape. The body 22 is designed so that the end having the second mounted portion 24 does not come into contact with the end. Further, the inner peripheral portions of the first and second cylindrical bodies 21 and 22 are formed with a flat surface for each of the notches of the first and second attached portions 23 and 24 to form an inner peripheral surface like a side surface of a polygonal prism. ing. The flat surface on the inner peripheral side corresponding to each notch forms contact surfaces 25 and 26 with which the end surface 14 of the tooth 1 opposite to the rotation shaft contacts.
[0018]
[Operation of Embodiment]
Next, the operation of the present embodiment will be described. First, the teeth 1, the first cylindrical body 21, and the second cylindrical body 22 are individually compression-molded using a magnetic powder material. Then, the stator winding is mounted on the iron core portion 12 from the mounting portion 11 of the tooth 1. Next, as shown in FIG. 5A, the mounting portion 11 provided on the tooth 1 is provided on the first mounting portion 23 provided on the first cylindrical body 21 and on the second cylindrical body 22. Between the second mounting portions 24. Then, a force in the direction of the rotation axis is applied from the end portions of the first and second tubular bodies 21 and 22 having no first and second attached portions 23 and 24. Thereby, as shown in FIG. 5B, the mounting portion 11 of the tooth 1 is pushed out from the inner peripheral side to the outer peripheral side of the core back 2 formed by the first and second cylindrical bodies 21 and 22. .
[0019]
The dimensions of the mounting portion 11 and the first and second mounted portions 23 and 24 are the end of the first cylindrical body 21 having the first mounted portion 23 and the second cylindrical portion 22 of the second mounted portion 24. It is designed so that it does not come into contact with the end having Therefore, when the mounting portion 11 is pushed out, the gap between the mounting portion 11 and the first and second mounted portions 23 and 24 is eliminated, and the non-rotating shaft side end surface 14 of the tooth 1 and the first and second cylindrical bodies 21 and 22 are removed. Is continued until the contact surfaces 25 and 26 contact with each other.
[0020]
[Effects of Embodiment]
As described above, the core back 2 is divided into the first and second cylindrical bodies 21 and 22 by dividing the core back 2 into two in the rotation axis direction. The stator is sandwiched between concave first and second mounting portions 23 and 24 provided on the first and second cylindrical bodies 21 and 22, and a force in the rotation axis direction is applied to the first and second cylindrical bodies 21 and 22. To form
As a result, the gap at the fitting portion, which has conventionally occurred when the teeth 1 are fitted to the core back 2, can be reduced, and the rotation characteristics of the rotating electric machine can be prevented from deteriorating. Furthermore, if the first and second cylindrical bodies 21 and 22 are divided into two equal parts in the rotation axis direction of the rotating electric machine, the teeth 1 can be arranged at the center of the core back 2 in the rotation axis direction.
[0021]
In addition, the mounting portion 11 is directed in a direction protruding from the non-rotational shaft side end surface 14 in a convex shape, and has a gradually increasing length in the rotation axis direction. Are formed by providing notches from the ends of the first and second cylindrical bodies 21 and 22. The depth of the notches gradually increases from the inner circumference to the outer circumference of the first and second cylindrical bodies 21 and 22. It is getting bigger.
As a result, the attachment portion 11 of the tooth 1 is pushed out from the inner peripheral side to the outer peripheral side of the core back 2 formed by the first and second cylindrical bodies 21 and 22, so that the teeth 1 and the core back 2 The gap that has occurred at the fitting portion can be eliminated. Further, even if a force in the direction of the rotation axis is applied to the core back 2, the teeth 1 can be prevented from coming off from the inner peripheral side of the core back 2 toward the rotation axis.
Further, when the teeth 1 are attached to the first and second cylindrical bodies 21 and 22, the stator winding wound around the teeth 1 and the first and second cylindrical bodies 21 and 22 hardly come into contact with each other. Less damage to the winding insulation film.
[0022]
The dimensions of the mounting portion 11 and the first and second mounted portions 23 and 24 are such that the end of the first cylindrical body 21 having the first mounted portion 23 and the second cylindrical body after the stator is formed. At 22, it is designed so that the end portion having the second mounted portion 24 does not come into contact with and interfere with the end portion.
Thereby, the force in the rotation axis direction can be applied to the core back 2 until the gap between the mounting portion 11 and the first and second mounted portions 23 and 24 is eliminated.
[0023]
The projected area of the mounting portion 11 on a projection plane perpendicular to the winding direction of the stator winding is smaller than the projected area of the non-rotational shaft side end face 14 on the same projection plane.
Thereby, the stator winding can be mounted on the iron core portion 12 from the mounting portion 11 of the tooth 1. For this reason, the processed stator windings can be mounted on the teeth 1 in a state where the teeth 1 and the core back 2 are separate bodies, so that the degree of freedom in processing the stator windings is increased and the space factor is reduced. Can be improved.
[0024]
Further, the end surface 14 of the tooth 1 on the side opposite to the rotation shaft is a flat surface, and the inner peripheral portions of the first and second cylindrical bodies 21 and 22 are formed with a flat surface for each notch of the first and second mounted portions 23 and 24. And has an inner peripheral surface (contact surfaces 25 and 26) such as a side surface of a polygonal prism.
As a result, a sufficient contact area can be ensured in the contact portions between the teeth 1 and the core back 2 except for the contact portions between the attachment portion 11 and the first and second attachment portions 23 and 24. The rigidity of the attachment between the teeth 1 and the core back 2 can be enhanced. That is, as shown in FIG. 4, if the end surface 14 on the anti-rotational shaft side on the side of the tooth 1 and the contact surfaces 25 and 26 on the side of the core back 2 are curved surfaces, depending on the processing accuracy of the tooth 1 and the core back 2, , There may be a difference between the respective curvatures. Therefore, the contact area may be reduced. However, such a problem does not occur if both are flat.
[0025]
Further, the teeth 1 and the first and second cylindrical bodies 21 and 22 are individually molded using a magnetic powder material.
As a result, complicated shapes such as the convex mounting portion 11 and the concave first and second mounting portions 23 and 24 can be compression-molded by using a mold. It is easier to manufacture than.
[0026]
[Other embodiments]
The teeth 1 of the present embodiment and the first cylindrical body 21 and the second cylindrical body 22 of the core back 2 are individually compression-molded using a magnetic powder material, but are molded by a conventional method using a laminated plate. May be. Alternatively, the stator winding is mounted on the preformed teeth 1, and then the magnetic powder material necessary for forming the core back 2 and the teeth 1 on which the stator windings are mounted are integrated. Alternatively, the stator may be formed by molding.
In addition, the tooth 1 of the present embodiment has one piece, but may be omitted.
[Brief description of the drawings]
FIG. 1 is a perspective view illustrating a configuration of a stator according to an embodiment.
FIG. 2A is a perspective view illustrating a tooth of the embodiment. (B) is a partial perspective view showing the cylindrical body of the embodiment.
FIG. 3 is a rear view of the teeth according to the embodiment.
FIG. 4 is an explanatory diagram illustrating a decrease in mounting rigidity due to a difference in curvature between a tooth and a core back.
FIG. 5A is a state diagram showing a state in which a tooth attachment portion is sandwiched between first and second attachment portions of first and second cylindrical bodies. (B) is a state diagram showing a state in which a force is applied in the direction of the rotation axis after the teeth attachment portion is sandwiched between the first and second attachment portions of the first and second cylindrical bodies.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Teeth 11 Attachment part 12 Iron core part 13 One part 14 Non-rotational shaft side end face 2 Core back 21 First tubular body 22 Second tubular body 23 First attached part 24 Second attached part 25 Contact surface (first (Tube side)
26 Contact surface (second cylindrical body side)

Claims (8)

固定子巻線が装着されるティースと、
このティースとは別体で成型され、前記ティースが保持される筒状のコアバックと
を備えた固定子であって、
前記コアバックは、前記固定子が用いられる回転電機の回転軸方向に２分割された第１筒状体および第２筒状体からなり、
前記ティースの反回転軸側端面に設けられた凸状の取付部を、前記第１筒状体に設けられた凹状の第１被取付部、および前記第２筒状体に設けられた凹状の第２被取付部で、挟むことにより形成されることを
特徴とする固定子。Teeth to which the stator windings are attached,
A stator having a cylindrical core back in which the teeth are molded separately and the teeth are held,
The core back includes a first cylindrical body and a second cylindrical body that are divided into two in a rotation axis direction of a rotating electric machine in which the stator is used,
A concave mounting portion provided on the first cylindrical body, and a concave mounting portion provided on the first cylindrical body, and a concave mounting portion provided on the second cylindrical body are provided on the teeth. A stator formed by being sandwiched by a second mounted portion. 請求項１に記載の固定子において、
前記取付部は、前記反回転軸側端面から凸状に突起する方向に向かい、前記回転軸方向の長さが徐々に大きくなっており、
前記第１被取付部および前記第２被取付部は、各々、前記第１筒状体および前記第２筒状体の前記回転軸方向における端部から切欠きを設けることによって形成され、
この切欠きの深さは、前記第１筒状体および前記第２筒状体の内周側から外周側に向かい、徐々に大きくなっていることを
特徴とする固定子。The stator according to claim 1,
The mounting portion is directed in a direction protruding from the end surface on the side opposite to the rotation shaft, and the length in the rotation shaft direction is gradually increased.
The first mounted portion and the second mounted portion are formed by providing notches from ends of the first cylindrical body and the second cylindrical body in the rotation axis direction, respectively.
The stator, wherein the depth of the notch gradually increases from the inner peripheral side to the outer peripheral side of the first cylindrical body and the second cylindrical body. 請求項１または請求項２に記載の固定子において、
前記固定子を形成した後も、前記第１筒状体において前記第１被取付部を有する端部と、前記第２筒状体において前記第２被取付部を有する端部とが接触しないことを特徴とする固定子。In the stator according to claim 1 or 2,
Even after the stator is formed, the end of the first tubular body having the first attached portion and the end of the second tubular body having the second attached portion are not in contact with each other. The stator characterized by the above. 請求項１ないし請求項３のうちのいずれか１つに記載の固定子において、
前記固定子巻線巻軸方向に垂直な投影面への前記取付部の投影面積は、前記投影面への前記反回転軸側端面の投影面積よりも小さいことを特徴とする固定子。In the stator according to any one of claims 1 to 3,
The stator according to claim 1, wherein a projection area of the mounting portion on a projection surface perpendicular to a winding direction of the stator winding is smaller than a projection area of the non-rotational shaft side end surface on the projection surface. 請求項１ないし請求項４のうちのいずれか１つに記載の固定子において、
前記反回転軸側端面と、前記反回転軸側端面が接触する前記コアバック側の接触面とは互いに平面をなしていることを特徴とする固定子。In the stator according to any one of claims 1 to 4,
The stator, wherein the end face on the non-rotating shaft side and the contact face on the core back side with which the end face on the non-rotating shaft side is in contact with each other are flat. 請求項１ないし請求項５のうちのいずれか１つに記載の固定子において、
前記ティース、前記第１筒状体および前記第２筒状体は、各々、磁気粉末材料を用いて個別に成型されることを特徴とする固定子。In the stator according to any one of claims 1 to 5,
The stator, wherein the teeth, the first tubular body, and the second tubular body are individually molded using a magnetic powder material. 固定子巻線が装着されるティースと、
このティースを保持するコアバックと
を備えた固定子であって、
予め成型された前記ティースに前記固定子巻線を装着し、
コアバックを成型するのに必要な量の磁気粉末材料と、前記固定子巻線が装着された前記ティースとを一体的に成型してなることを特徴とする固定子。Teeth to which the stator windings are attached,
A stator having a core back that holds the teeth,
Attach the stator winding to the preformed teeth,
A stator comprising: an amount of magnetic powder material necessary for molding a core back; and the teeth on which the stator windings are mounted are integrally molded. 請求項１ないし請求項７のうちのいずれか１つに記載の固定子を用いた回転電機。A rotating electric machine using the stator according to any one of claims 1 to 7.
JP2003093803A 2003-03-31 2003-03-31 Stator and rotating electric machine Expired - Fee Related JP4032352B2 (en)

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* Cited by examiner, † Cited by third party
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JP2006129686A (en) * 2004-11-01 2006-05-18 Lg Electronics Inc Outer stator of reciprocating motor, and manufacturing method thereof
JP2007135331A (en) * 2005-11-11 2007-05-31 Sumitomo Electric Ind Ltd Stator core and stator
WO2008102860A1 (en) * 2007-02-23 2008-08-28 Jtekt Corporation Motor, and electric pump
WO2013157083A1 (en) * 2012-04-17 2013-10-24 株式会社安川電機 Rotating electrical machine
CN105703497A (en) * 2014-12-10 2016-06-22 罗伯特·博世有限公司 Electrical machine, in particular starter motor for starting device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006129686A (en) * 2004-11-01 2006-05-18 Lg Electronics Inc Outer stator of reciprocating motor, and manufacturing method thereof
JP2007135331A (en) * 2005-11-11 2007-05-31 Sumitomo Electric Ind Ltd Stator core and stator
WO2008102860A1 (en) * 2007-02-23 2008-08-28 Jtekt Corporation Motor, and electric pump
US8310125B2 (en) 2007-02-23 2012-11-13 Jtekt Corporation Motor and electric pump having a stator including a first sintered metal and second sintered metal
WO2013157083A1 (en) * 2012-04-17 2013-10-24 株式会社安川電機 Rotating electrical machine
CN105703497A (en) * 2014-12-10 2016-06-22 罗伯特·博世有限公司 Electrical machine, in particular starter motor for starting device
CN105703497B (en) * 2014-12-10 2018-05-18 Seg汽车德国有限责任公司 Motor, the starter motor for being particularly used for starting device

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